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chore: drop generated artifacts not tracked on master - #231

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chore: drop generated artifacts not tracked on master#231
jaylfc wants to merge 3 commits into
masterfrom
exec/tsk-legqtr

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@jaylfc

@jaylfc jaylfc commented Aug 2, 2026

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Autonomous build of board card tsk-legqtr.

Files:
taosmd/http_server.py | 32 +++++----
taosmd/registry_auth.py | 52 +++++++++++---
tests/test_http_server_trust_enforcement.py | 108 +++++++++++++++++++++++++++-
tests/test_registry_auth.py | 100 ++++++++++++++++++++++++++
4 files changed, 266 insertions(+), 26 deletions(-)

Summary by CodeRabbit

  • New Features

    • Added support for authenticating messages from human principals through the configured controller issuer.
    • Verified human identities are matched to the message sender and retained with accepted messages.
    • Human senders can be authenticated without agent-specific grant or revocation checks.
  • Bug Fixes

    • Invalid or mismatched credentials are now rejected consistently, including warning mode.
    • Improved separation between human and agent token issuers and identity validation.

jaylfc added 3 commits August 2, 2026 12:36
- Add CONTROLLER_ISS and _is_human_sub to distinguish human principals
- authorize_sender now handles human principals (user-* sub) using the same
  decode_and_verify entry point, skipping revocation and pinning to the
  controller issuer
- /a2a/send derives sender from the verified token sub, not the request body
- Presented-but-failing credentials are rejected 403 in both modes for both
  principal types; missing credential remains the only tolerated class
- Humans are skipped for grant checks (no registry identity)
- Add unit tests for human auth, cross-claim rejection, and single-chain proof
- Add integration tests for human behavior on the live server
@coderabbitai

coderabbitai Bot commented Aug 2, 2026

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Review Change Stack

📝 Walkthrough

Walkthrough

Registry authentication now supports controller-issued human principals. A2A requests use verified token subjects, reject invalid presented credentials in all modes, skip grants for human senders, and persist the verified identity.

Changes

Human Principal Authentication

Layer / File(s) Summary
Issuer-aware sender authorization
taosmd/registry_auth.py, tests/test_registry_auth.py
Human subjects use the configured controller issuer and bypass registry revocation checks. Agent subjects retain registry issuer and revocation validation. Tests cover issuer separation and shared token verification.
Verified A2A sender flow
taosmd/http_server.py
A2A authentication uses the bearer token subject as the effective sender. Invalid presented tokens return 403, grants apply only to agents, and persisted messages use the verified identity.
Authentication policy validation
tests/test_http_server_trust_enforcement.py
Tests cover matching and mismatched human identities, cross-principal issuers, invalid tokens in warn mode, and missing-token handling.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Sequence Diagram(s)

sequenceDiagram
  participant A2AClient
  participant http_server
  participant RegistryVerifier
  participant MessageStore
  A2AClient->>http_server: Send message with claimed sender and bearer token
  http_server->>RegistryVerifier: Authorize token and claimed sender
  RegistryVerifier-->>http_server: Return verified subject and principal type
  http_server->>MessageStore: Persist message with verified sender identity
  MessageStore-->>http_server: Confirm persistence
  http_server-->>A2AClient: Return authentication result
Loading

Possibly related PRs

  • jaylfc/taosmd#148: Extends the same A2A authentication flow with human-principal issuer handling.
  • jaylfc/taosmd#194: Also modifies A2A authentication logic in taosmd/http_server.py.
🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Title check ⚠️ Warning The title describes generated artifact cleanup, but the pull request adds controller-signed human principal authentication and trust enforcement. Replace the title with a concise summary of human principal authentication, such as: "feat: support controller-signed human assertions for A2A sends".
✅ Passed checks (4 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
✨ Finishing Touches
📝 Generate docstrings
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch exec/tsk-legqtr

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Actionable comments posted: 5

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)
taosmd/registry_auth.py (1)

162-169: 🩺 Stability & Availability | 🔴 Critical | 🏗️ Heavy lift

Eager revocation fetch defeats the human bypass guarantee.

authorize() calls self._get_revoked() as a function argument before dispatching to authorize_sender. Python evaluates this argument eagerly, on every call, regardless of the token's principal type.

The docstring for authorize_sender states: for human principals (sub starting with user-): the token must carry a valid iss matching human_iss when set; revocation is not checked (humans are not in the registry). RegistryVerifier also documents fail-closed semantics: Revocation failures are handled fail-closed where it matters: if the feed has NEVER loaded, :meth:authorize raises (we cannot prove an agent is unrevoked, so we refuse).

Because _get_revoked() runs unconditionally before the human/agent branch is even reached, a registry revocation feed that has never loaded blocks ALL A2A traffic, including controller-signed human assertions that do not need the revocation feed at all. This contradicts the PR's stated goal of "exclusion of human principals from revocation... checks" and ties human authentication availability to an unrelated registry dependency. The existing tests never exercise this path because the fake revoked_loader in test fixtures always succeeds (returns []).

Skip the eager fetch when the caller-asserted identity is already a human sub (the real signature/sub check inside authorize_sender still catches a spoofed claim).

🔧 Proposed fix to defer the revocation fetch for human principals
     def authorize(self, token: str, claimed_from: str) -> dict:
         """Authorise a sender; return verified claims or raise AuthError."""
+        # Humans don't need the revocation feed at all; skip the eager fetch
+        # so a registry revocation-feed outage cannot block human traffic.
+        revoked = set() if _is_human_sub(claimed_from) else self._get_revoked()
         return authorize_sender(
             token, claimed_from,
-            public_key=self._get_pubkey(), revoked=self._get_revoked(),
+            public_key=self._get_pubkey(), revoked=revoked,
             expected_iss=self._expected_iss,
             human_iss=self._human_iss,
         )
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@taosmd/registry_auth.py` around lines 162 - 169, Update
RegistryVerifier.authorize so it does not eagerly call _get_revoked() when
claimed_from identifies a human principal (a sub beginning with “user-”); defer
or bypass the revocation fetch for that path while preserving authorize_sender’s
signature and claim validation. Continue fetching revocations for agent
principals and retain fail-closed behavior when the feed has never loaded.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@taosmd/http_server.py`:
- Around line 1450-1459: Update the comment above sender authentication in the
registry verifier path to state that presented-but-failing credentials are
always rejected in every mode for all principal types, while only missing
credentials may be tolerated during migration. Remove the human-specific
qualification and preserve the surrounding implementation.
- Around line 1470-1487: Rename the module-private helper _is_human_sub to the
public is_human_sub in registry_auth, then update both authorize_sender and the
http_server.py call site to use the new public symbol. Preserve the helper’s
existing behavior and all other authorization logic.
- Around line 1482-1487: Update the auth branching around
_grants_verifier.has_grant and the _is_human check so human principals are
excluded from registry-gated data endpoints (/ingest, /search, and /tasks/*).
Route human requests through the existing admin-only authentication path, while
preserving the A2A-specific human exemption and grant validation for non-human
principals.

In `@tests/test_http_server_trust_enforcement.py`:
- Around line 197-202: Rename the test function test_warn_invalid_token_accepted
to reflect that invalid tokens are rejected with HTTP 403, such as
test_warn_invalid_token_rejected; leave the test body and assertions unchanged.
- Around line 386-434: Prefix the unused response-body unpacking variable with
an underscore in test_human_assertion_sub_mismatch_rejected_in_warn_mode,
test_agent_jwt_claiming_human_id_rejected_in_warn_mode, and
test_human_assertion_claiming_agent_id_rejected_in_warn_mode, while leaving the
status assertions unchanged.

---

Outside diff comments:
In `@taosmd/registry_auth.py`:
- Around line 162-169: Update RegistryVerifier.authorize so it does not eagerly
call _get_revoked() when claimed_from identifies a human principal (a sub
beginning with “user-”); defer or bypass the revocation fetch for that path
while preserving authorize_sender’s signature and claim validation. Continue
fetching revocations for agent principals and retain fail-closed behavior when
the feed has never loaded.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 05de5d2a-b4a0-4f64-85d0-06a1d8505286

📥 Commits

Reviewing files that changed from the base of the PR and between dac15f0 and f0ad492.

📒 Files selected for processing (4)
  • taosmd/http_server.py
  • taosmd/registry_auth.py
  • tests/test_http_server_trust_enforcement.py
  • tests/test_registry_auth.py

Comment thread taosmd/http_server.py
Comment on lines +1450 to 1459
# Human principals (sub starting with user-) are always rejected on
# auth failure regardless of mode: missing credential is the only
# tolerated class during migration.
sender = from_
_is_human = False
if _registry_verifier is not None:
from . import registry_auth # noqa: PLC0415 - optional path
auth = self.headers.get("Authorization", "")
token = auth[len("Bearer "):].strip() if auth.startswith("Bearer ") else ""

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Update the comment to match the generalized rejection policy.

The comment states: Human principals (sub starting with user-) are always rejected on auth failure regardless of mode: missing credential is the only tolerated class during migration. The actual implementation, per the comment further down, applies this rule to every principal type: Presented-but-failing credentials are always rejected (both modes), regardless of principal type. Missing credential is the only class tolerated during migration.

Reword the comment at Line 1450 so it does not imply the always-reject rule is human-specific. A future maintainer reading only this comment could reintroduce a warn-mode tolerance for agents with invalid tokens.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@taosmd/http_server.py` around lines 1450 - 1459, Update the comment above
sender authentication in the registry verifier path to state that
presented-but-failing credentials are always rejected in every mode for all
principal types, while only missing credentials may be tolerated during
migration. Remove the human-specific qualification and preserve the surrounding
implementation.

Comment thread taosmd/http_server.py
Comment on lines +1470 to +1487
claims = _registry_verifier.authorize(token, from_)
sender = claims["sub"]
_is_human = registry_auth._is_human_sub(sender)
except registry_auth.AuthError as exc:
warn_reason = str(exc)
_reject_status = 403
_reject_msg = f"registry auth: {exc}"
# Presented-but-failing credentials are always rejected
# (both modes), regardless of principal type. Missing
# credential is the only class tolerated during migration.
self._send_json(403, {"error": f"registry auth: {exc}"})
return

# Grant check: token proves identity; grant proves permission.
if warn_reason is None and _grants_verifier is not None:
# Humans are not in the registry, so they have no grants.
if warn_reason is None and _grants_verifier is not None and not _is_human:
try:
if not _grants_verifier.has_grant(from_):
if not _grants_verifier.has_grant(sender):
warn_reason = "no a2a_send grant"
_reject_status = 403
_reject_msg = f"registry auth: no active grant for {from_!r}"
_reject_msg = f"registry auth: no active grant for {sender!r}"

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📐 Maintainability & Code Quality | 🟠 Major | ⚡ Quick win

Avoid calling a module-private helper across module boundaries.

registry_auth._is_human_sub is underscore-prefixed, signaling it is module-internal. http_server.py calls it directly at Line 1472. Export it as a public function (drop the leading underscore) since it is now part of the cross-module contract for identifying human principals.

♻️ Proposed rename to a public helper
-def _is_human_sub(sub: str) -> bool:
+def is_human_sub(sub: str) -> bool:
     """Return True if the sub is a human canonical id (user-* convention)."""
     return sub.startswith("user-")

Update the internal call site in authorize_sender and the external call in http_server.py (registry_auth._is_human_sub(sender)registry_auth.is_human_sub(sender)) accordingly.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@taosmd/http_server.py` around lines 1470 - 1487, Rename the module-private
helper _is_human_sub to the public is_human_sub in registry_auth, then update
both authorize_sender and the http_server.py call site to use the new public
symbol. Preserve the helper’s existing behavior and all other authorization
logic.

Comment thread taosmd/http_server.py
Comment on lines +1482 to +1487
if warn_reason is None and _grants_verifier is not None and not _is_human:
try:
if not _grants_verifier.has_grant(from_):
if not _grants_verifier.has_grant(sender):
warn_reason = "no a2a_send grant"
_reject_status = 403
_reject_msg = f"registry auth: no active grant for {from_!r}"
_reject_msg = f"registry auth: no active grant for {sender!r}"

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🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Description: Check whether human principals (user-* subjects) are expected to reach
# endpoints gated by _apply_token_binding, and whether has_grant is exempted for them.
rg -n -C5 '_apply_token_binding|has_grant\(' taosmd/http_server.py

Repository: jaylfc/taosmd

Length of output: 9483


🏁 Script executed:

#!/bin/bash
set -euo pipefail

echo "== http_server.py relevant token/human binding sections =="
sed -n '730,875p' taosmd/http_server.py | cat -n | sed 's/^/730+/'
echo

echo "== occurrences of _is_human_sub / user- / human principals =="
rg -n -C3 '_is_human_sub|user-_|is_human|human|_token_project|_apply_token_binding' taosmd/http_server.py
echo

echo "== route handlers mentioning /ingest /search /tasks =="
rg -n -C4 '"/(ingest|search|tasks|tasks/|ingest_batch)|ingest_batch|task_list|task_ready|task_prime|task_edges|_handle_task' taosmd/http_server.py | sed -n '1,240p'

Repository: jaylfc/taosmd

Length of output: 27628


🏁 Script executed:

#!/bin/bash
set -euo pipefail

echo "== registry_auth.py outline =="
ast-grep outline taosmd/registry_auth.py --view expanded || true
echo

echo "== registry_auth.py relevant constants and _is_human_sub implementation =="
rg -n -C8 'REGISTRY_ISS|CONTROLLER_ISS|_is_human_sub|has_grant|verify|decode' taosmd/registry_auth.py

echo
echo "== route auth gate coverage =="
sed -n '888,1002p' taosmd/http_server.py | cat -n | sed 's/^/888+/'

Repository: jaylfc/taosmd

Length of output: 16532


Keep human principals out of registry-gated data endpoints.

Human principals are allowed on A2A because they are not registry grant members. Route them through admin-only auth instead of letting controller human tokens reach /ingest, /search, or /tasks/*, because _apply_token_binding will reject those requests with no active grant when the grant feed is present and the principal is human. Do not apply the A2A human exemption to these data endpoints unless each endpoint is explicitly designed for human users.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@taosmd/http_server.py` around lines 1482 - 1487, Update the auth branching
around _grants_verifier.has_grant and the _is_human check so human principals
are excluded from registry-gated data endpoints (/ingest, /search, and
/tasks/*). Route human requests through the existing admin-only authentication
path, while preserving the A2A-specific human exemption and grant validation for
non-human principals.

Comment on lines 197 to +202
def test_warn_invalid_token_accepted(warn_server, caplog):
"""Invalid token: message accepted and warning logged in warn mode."""
"""Invalid token: message rejected with 403 regardless of mode."""
import logging
with caplog.at_level(logging.WARNING, logger="taosmd.http_server"):
status, body = _post_send(warn_server, "any-agent", "hello", token="not-a-jwt")
assert status == 200, body
assert any("verify-and-warn" in r.message for r in caplog.records)
assert status == 403, body

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Rename the test to match its new assertion.

The function is named test_warn_invalid_token_accepted, but the body now asserts rejection: """Invalid token: message rejected with 403 regardless of mode.""" Rename it (e.g. test_warn_invalid_token_rejected) so the test name reflects the current behavior and does not mislead readers relying on test names to understand policy.

🧰 Tools
🪛 Ruff (0.16.0)

[error] 201-201: Possible hardcoded password assigned to argument: "token"

(S106)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@tests/test_http_server_trust_enforcement.py` around lines 197 - 202, Rename
the test function test_warn_invalid_token_accepted to reflect that invalid
tokens are rejected with HTTP 403, such as test_warn_invalid_token_rejected;
leave the test body and assertions unchanged.

Comment on lines +386 to +434
def test_human_assertion_sub_mismatch_rejected_in_warn_mode(human_warn_server):
"""Human assertion whose sub does not match from is rejected 403 even in
warn mode (fail-first: on master this would be 200)."""
token = pyjwt.encode(
{"sub": "user-123", "iss": registry_auth.CONTROLLER_ISS},
PRIV_PEM, algorithm="EdDSA",
)
status, body = _post_send(human_warn_server, "user-456", "hello", token=token)
assert status == 403


def test_human_assertion_sub_match_accredited(human_warn_server):
"""Valid human assertion with matching sub is accepted."""
token = pyjwt.encode(
{"sub": "user-123", "iss": registry_auth.CONTROLLER_ISS},
PRIV_PEM, algorithm="EdDSA",
)
status, body = _post_send(human_warn_server, "user-123", "hello", token=token)
assert status == 200, body


def test_agent_jwt_claiming_human_id_rejected_in_warn_mode(human_warn_server):
"""An agent JWT (iss=taos-registry) with a user-* sub is rejected 403."""
token = pyjwt.encode(
{"sub": "user-123", "iss": registry_auth.REGISTRY_ISS},
PRIV_PEM, algorithm="EdDSA",
)
status, body = _post_send(human_warn_server, "user-123", "hello", token=token)
assert status == 403


def test_human_assertion_claiming_agent_id_rejected_in_warn_mode(human_warn_server):
"""A human assertion (iss=taos-controller) with an agent sub is rejected 403."""
token = pyjwt.encode(
{"sub": "agent-1", "iss": registry_auth.CONTROLLER_ISS},
PRIV_PEM, algorithm="EdDSA",
)
status, body = _post_send(human_warn_server, "agent-1", "hello", token=token)
assert status == 403


def test_human_missing_token_accepted_in_warn_mode(human_warn_server, caplog):
"""Missing token for a human principal is accepted with warning in warn mode."""
import logging
with caplog.at_level(logging.WARNING, logger="taosmd.http_server"):
status, body = _post_send(human_warn_server, "user-123", "hello")
assert status == 200, body
assert any("verify-and-warn" in r.message and "missing Bearer token" in r.message
for r in caplog.records)

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Logic is correct; clean up unused unpacked variables.

The four new tests correctly exercise sub mismatch, matching-sub acceptance, cross-principal issuer rejection in both directions, and missing-token tolerance. Static analysis flags body as unused at Lines 393, 413, and 423 (unlike the sibling assertions at Lines 404 and 432, which pass body as the assert message). Prefix the unused unpacking with an underscore.

🧹 Proposed fix for unused unpacked variables
-    status, body = _post_send(human_warn_server, "user-456", "hello", token=token)
+    status, _body = _post_send(human_warn_server, "user-456", "hello", token=token)
     assert status == 403

Apply the same change at Lines 413 and 423.

🧰 Tools
🪛 Ruff (0.16.0)

[warning] 393-393: Unpacked variable body is never used

Prefix it with an underscore or any other dummy variable pattern

(RUF059)


[warning] 413-413: Unpacked variable body is never used

Prefix it with an underscore or any other dummy variable pattern

(RUF059)


[warning] 423-423: Unpacked variable body is never used

Prefix it with an underscore or any other dummy variable pattern

(RUF059)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@tests/test_http_server_trust_enforcement.py` around lines 386 - 434, Prefix
the unused response-body unpacking variable with an underscore in
test_human_assertion_sub_mismatch_rejected_in_warn_mode,
test_agent_jwt_claiming_human_id_rejected_in_warn_mode, and
test_human_assertion_claiming_agent_id_rejected_in_warn_mode, while leaving the
status assertions unchanged.

Source: Linters/SAST tools

@qodo-code-review

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PR Summary by Qodo

A2A: accept controller-signed human assertions and tighten /a2a/send auth failures

✨ Enhancement 🐞 Bug fix 🧪 Tests 🕐 40+ Minutes

Grey Divider

AI Description

• Accept controller-signed human principals (user-*) when posting to /a2a/send.
• Pin token issuer per principal type and derive sender from verified token subject.
• Reject presented invalid credentials in warn/enforce modes; add focused unit/integration tests.
Diagram

sequenceDiagram
  actor Client
  participant HTTP as "HTTP Server /a2a/send"
  participant RV as "RegistryVerifier"
  participant GV as "GrantsVerifier"
  participant SVC as "service.a2a_send"

  Client->>HTTP: POST /a2a/send (from, body, Bearer token?)
  alt Bearer token presented
    HTTP->>RV: authorize(token, claimed_from)
    RV-->>HTTP: claims{sub, iss}
    HTTP->>HTTP: sender = claims.sub (detect human via user-*)
    alt agent principal
      HTTP->>GV: has_grant(sender)
      GV-->>HTTP: grant ok / missing
    else human principal
      HTTP->>HTTP: skip grants + skip revocation
    end
    HTTP->>SVC: a2a_send(sender, body, ...)
    SVC-->>HTTP: result
    HTTP-->>Client: 200
  else token invalid / mismatched
    HTTP-->>Client: 403 (always reject)
  else Bearer token missing
    HTTP->>SVC: a2a_send(from, body, ...)
    SVC-->>HTTP: result
    HTTP-->>Client: 200 (warn-mode migration behavior)
  end
Loading
High-Level Assessment

The following are alternative approaches to this PR:

1. Use explicit principal type claim (vs user-* sub convention)
  • ➕ Avoids relying on naming conventions for security decisions
  • ➕ Supports multiple human identifier formats without code changes
  • ➖ Requires coordinated claim schema changes across controller and bus
  • ➖ Migration complexity (mixed old/new tokens)
2. Separate controller verification key/JWKS endpoint from registry key
  • ➕ Stronger separation of trust domains; harder to misconfigure issuer pinning
  • ➕ Enables independent key rotation policies for controller vs registry
  • ➖ Adds configuration and operational complexity
  • ➖ More moving parts in offline/unit tests
3. Enforce audience/scope claims for /a2a/send
  • ➕ Tighter token purpose binding than issuer pinning alone
  • ➕ Reduces risk of token reuse across endpoints
  • ➖ Requires issuer changes to mint aud/scope consistently
  • ➖ May break existing clients during rollout

Recommendation: The PR’s approach (issuer pinning + subject/from match, with a clear human-vs-agent branch) is a pragmatic migration step that blocks cross-issuer spoofing while keeping a single verification entry point. If human principals become a long-term feature, consider moving from the user-* convention to an explicit principal-type claim and adding aud/scope enforcement for stronger, more future-proof policy controls.

Files changed (4) +266 / -26

Enhancement (2) +61 / -23
http_server.pyDerive /a2a/send sender from verified token and handle human principals +20/-12

Derive /a2a/send sender from verified token and handle human principals

• Wires the registry verifier with a dedicated controller issuer for human assertions. Updates /a2a/send to set sender from verified JWT claims, detect human subjects, skip grant checks for humans, and always reject presented-but-invalid credentials with 403 (warn/enforce modes).

taosmd/http_server.py

registry_auth.pyAdd controller issuer pinning and human-aware sender authorization +41/-11

Add controller issuer pinning and human-aware sender authorization

• Introduces CONTROLLER_ISS and a user-* subject classifier for human principals. Extends authorize_sender and RegistryVerifier to pin issuer for human tokens, skip revocation for humans, and keep existing revocation + issuer pinning for agents; propagates human_iss through verifier_from_url.

taosmd/registry_auth.py

Tests (2) +205 / -3
test_http_server_trust_enforcement.pyAdd server-level tests for human assertions and stricter warn-mode failures +105/-3

Add server-level tests for human assertions and stricter warn-mode failures

• Updates the warn-mode invalid-token test to expect 403 (presented invalid credentials are no longer tolerated). Adds a human-capable server fixture and integration tests covering sub mismatch rejection, issuer spoofing rejection, and missing-token acceptance with warning in warn mode.

tests/test_http_server_trust_enforcement.py

test_registry_auth.pyAdd unit tests for human principal authorization rules +100/-0

Add unit tests for human principal authorization rules

• Adds targeted tests validating human issuer pinning, sub/from matching, revocation skipping for humans, and cross-claim rejection (registry issuer claiming human sub and controller issuer claiming agent sub). Includes a test ensuring decode_and_verify remains the single verification entry point for both principal types.

tests/test_registry_auth.py

@qodo-code-review

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Code Review by Qodo

🐞 Bugs (1) 📘 Rule violations (1) 📜 Skill insights (0)

Context used
✅ Compliance rules (platform): 13 rules

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Remediation recommended

1. AuthError return skips archiving 📘 Rule violation ☼ Reliability
Description
_handle_a2a_send() now returns immediately on presented-but-invalid credentials, so the request is
rejected without any archive.record() call. This violates the requirement to archive interactions
on both success and failure paths (including errors).
Code

taosmd/http_server.py[R1474-1478]

+                        # Presented-but-failing credentials are always rejected
+                        # (both modes), regardless of principal type. Missing
+                        # credential is the only class tolerated during migration.
+                        self._send_json(403, {"error": f"registry auth: {exc}"})
+                        return
Relevance

●●● Strong

Repo emphasizes archive-first/zero-loss; prior fixes ensure failures still archived (e.g., ingest
warnings without dropping archive writes).

PR-#182
PR-#131

ⓘ Recommendations generated based on similar findings in past PRs

Evidence
In taosmd/http_server._handle_a2a_send, the new except registry_auth.AuthError branch sends a
403 and returns immediately, so the handler never reaches the call to service.a2a_send(...). Since
service.a2a_send(...) is where the archive write happens via archive.record(...), this failure
path results in an unarchived interaction, violating the rule requiring archiving regardless of
success/failure.

Rule 1019881: Archive every interaction with a single, centralized logger call
taosmd/http_server.py[1450-1508]
taosmd/service.py[344-403]

Agent prompt
The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

## Issue description
The HTTP entrypoint `_handle_a2a_send()` returns early on `registry_auth.AuthError`, sending a 403 response without archiving the failed interaction.

## Issue Context
The success path archives via `service.a2a_send()` (which calls `archive.record(...)`), but the new early-return failure path bypasses that entirely. Compliance requires archiving error/failure turns as well.

## Fix Focus Areas
- taosmd/http_server.py[1469-1505]
- taosmd/service.py[344-403]

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools


2. Warn-mode docs stale 🐞 Bug ◔ Observability
Description
taosmd/http_server.py documents verify-and-warn mode as logging auth failures and still accepting
messages, but _handle_a2a_send now returns 403 immediately for presented-but-invalid credentials
(skipping the warn/enforce decision and any warning log). This makes operator guidance inaccurate
and removes warn-mode visibility into invalid credential attempts.
Code

taosmd/http_server.py[R1475-1478]

+                        # (both modes), regardless of principal type. Missing
+                        # credential is the only class tolerated during migration.
+                        self._send_json(403, {"error": f"registry auth: {exc}"})
+                        return
Relevance

●●● Strong

Team has accepted correcting misleading comments/docs when behavior changes (e.g., revised
inaccurate inline claims).

PR-#83
PR-#181

ⓘ Recommendations generated based on similar findings in past PRs

Evidence
The module documentation states verify-and-warn accepts failures and logs warnings, but the new
AuthError branch immediately returns 403, bypassing the warn/enforce block and its logger.warning
call. The updated warn-mode test now expects 403 for invalid tokens and does not assert any warning
is logged.

taosmd/http_server.py[24-38]
taosmd/http_server.py[1444-1501]
tests/test_http_server_trust_enforcement.py[187-203]

Agent prompt
The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

## Issue description
`POST /a2a/send` verify-and-warn semantics are now inconsistent with the module’s documentation/comments: presented-but-invalid credentials are rejected with 403 even when `a2a_auth_enforce=false`, and this path returns before the warning log branch.

## Issue Context
This appears intentional per the updated tests (invalid token rejected regardless of mode), but the top-of-file “Security note” still describes verify-and-warn as accepting failures and logging a warning, which is no longer true for invalid tokens (and humans also skip grant checks).

## Fix Focus Areas
- Update the `http_server.py` Security note / comments to accurately describe current behavior (what is accepted in warn mode vs rejected in all modes).
- Decide and implement expected observability for rejected invalid credentials (e.g., emit a `logger.warning(...)` or structured auth-failure log before returning 403, without logging the token).
- Optionally add/adjust tests to assert the intended logging behavior for invalid-token rejections in warn mode.

### Files/lines to change
- taosmd/http_server.py[24-44]
- taosmd/http_server.py[1444-1501]
- tests/test_http_server_trust_enforcement.py[187-203]

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools


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Comment thread taosmd/http_server.py
Comment on lines +1474 to +1478
# Presented-but-failing credentials are always rejected
# (both modes), regardless of principal type. Missing
# credential is the only class tolerated during migration.
self._send_json(403, {"error": f"registry auth: {exc}"})
return

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Remediation recommended

1. Autherror return skips archiving 📘 Rule violation ☼ Reliability

_handle_a2a_send() now returns immediately on presented-but-invalid credentials, so the request is
rejected without any archive.record() call. This violates the requirement to archive interactions
on both success and failure paths (including errors).
Agent Prompt
## Issue description
The HTTP entrypoint `_handle_a2a_send()` returns early on `registry_auth.AuthError`, sending a 403 response without archiving the failed interaction.

## Issue Context
The success path archives via `service.a2a_send()` (which calls `archive.record(...)`), but the new early-return failure path bypasses that entirely. Compliance requires archiving error/failure turns as well.

## Fix Focus Areas
- taosmd/http_server.py[1469-1505]
- taosmd/service.py[344-403]

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

Comment thread taosmd/http_server.py
Comment on lines +1475 to +1478
# (both modes), regardless of principal type. Missing
# credential is the only class tolerated during migration.
self._send_json(403, {"error": f"registry auth: {exc}"})
return

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Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Remediation recommended

2. Warn-mode docs stale 🐞 Bug ◔ Observability

taosmd/http_server.py documents verify-and-warn mode as logging auth failures and still accepting
messages, but _handle_a2a_send now returns 403 immediately for presented-but-invalid credentials
(skipping the warn/enforce decision and any warning log). This makes operator guidance inaccurate
and removes warn-mode visibility into invalid credential attempts.
Agent Prompt
## Issue description
`POST /a2a/send` verify-and-warn semantics are now inconsistent with the module’s documentation/comments: presented-but-invalid credentials are rejected with 403 even when `a2a_auth_enforce=false`, and this path returns before the warning log branch.

## Issue Context
This appears intentional per the updated tests (invalid token rejected regardless of mode), but the top-of-file “Security note” still describes verify-and-warn as accepting failures and logging a warning, which is no longer true for invalid tokens (and humans also skip grant checks).

## Fix Focus Areas
- Update the `http_server.py` Security note / comments to accurately describe current behavior (what is accepted in warn mode vs rejected in all modes).
- Decide and implement expected observability for rejected invalid credentials (e.g., emit a `logger.warning(...)` or structured auth-failure log before returning 403, without logging the token).
- Optionally add/adjust tests to assert the intended logging behavior for invalid-token rejections in warn mode.

### Files/lines to change
- taosmd/http_server.py[24-44]
- taosmd/http_server.py[1444-1501]
- tests/test_http_server_trust_enforcement.py[187-203]

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

@jaylfc

jaylfc commented Aug 2, 2026

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Closing for rework. The tests are real (37 to 49, they run, they pass) and the crypto choices are sound where they exist: the algorithm is pinned to EdDSA, alg-none is rejected, HMAC confusion is rejected, a foreign key is rejected. But the feature does not do what it says, and it ships a default-mode regression.

BLOCKING 1, the feature is decorative. On the no-credential path, a message with from=user-jay and NO token is ACCEPTED in default warn mode, and the sender is stored verbatim as user-jay. Reproduced live against your own fixture: 200, readback shows from user-jay. The PR asserts this as intended behaviour in test_human_missing_token_accepted_in_warn_mode. So this change introduces user-* as a semantically privileged namespace meaning 'a human said this', and simultaneously leaves that namespace claimable by any anonymous client on the LAN. The credential only makes an honest client's message ALSO valid; it gates nothing an attacker has to pass. Every agent reading the bus will treat user-jay as Jay.

BLOCKING 2, controller and registry are not a trust boundary. verifier_from_url builds ONE key loader pointed at the registry pubkey path. There is no controller key and no kid selection, so controller-signed versus registry-signed is a string in a claim inside a single signing domain. Your own tests mint both the human assertion and the agent JWT from the same private key, which shows it. Either add a real controller key source, or correct the docstring that says the bus pins this so a registry token cannot spoof a human identity, because today it can.

BLOCKING 3, nothing produces these tokens. Nothing in tinyagentos mints a human assertion: no taos-controller issuer anywhere, mint_registry_token hardcodes iss taos-registry, and no user-prefixed subject exists. So no token this PR would accept as a human can currently be created, and the only reachable human path is the credential-free one above. That is the same unwired-feature pattern that sank the earlier taosmd PRs.

BLOCKING 4, availability regression in the DEFAULT config, not mentioned in the PR body. authorize() evaluates the revocation feed eagerly before principal dispatch, and invalid-token handling changed to an unconditional 403. Measured on both branches with a valid, granted, unrevoked agent token and the revocation feed unreachable: master returns 200, this branch returns 403. Warn mode is documented as accepting the message with a warning; that is now only true for the missing-token case, so any agent on a stale token breaks the moment this deploys.

ALSO: a user-* sub with human_iss unset skips BOTH revocation and issuer pinning, so it must fail closed. And user- is not reserved on the taOS side: slugify('User') yields canonical id user-YYYYMMDD-HHMMSS, which the prefix test classifies as human. Demonstrated: a revoked agent with that shape authorised successfully.

MUTATION RESULT worth acting on: disabling the expiry check entirely leaves all 49 tests passing. Expiry is unverified by any test, works only because PyJWT defaults to it, and taOS never mints exp anyway, so every token it issues is an eternal bearer credential. Also none of the 12 new tests catches a forged signature; the one test that does is pre-existing.

Adjudication: CodeRabbit's eager-revocation finding is VALID and understated, it affects agents not just humans and is a regression against master. Its finding 4 is partly valid but do not apply the suggested remedy, routing humans through admin auth would widen reach. Kilo is the rate-limited fake red. And please retitle: this is the fifth consecutive taosmd PR wearing 'chore: drop generated artifacts', while actually being a feat that changes bus identity.

@jaylfc jaylfc closed this Aug 2, 2026
@jaylfc
jaylfc deleted the exec/tsk-legqtr branch August 9, 2026 12:52
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